Seth Rogen, who is only on Twitter until Jan. 13 to earn money for his charity...and clearly making the most of each and every one of his tweets: "True Story 1: I once peed in a Snapple bottle in my car while parked in Tom Cruise's driveway."

Hilary Duff, who is expecting her first child: "Man it's hard to sleep with this big ol belly!"

Liam McDermott, son of Tori Spelling and Dean McDermott, who dictates his tweets to his parents: "I like boy colors on my toes. Like a rockstar! Don't want glitter colors or I'll look like a Kardashian! @KimKardashian @kourtneykardash"

Kelly Clarkson, who then shared the following pic from her Who Say: "Some lady left me with her baby ....she must be crazy!"

Kanye West during an 80-post Twitter spree one night this week: "Spike Jonze and I want to do a Summer school that tries new forms of cuuriculim."

Rachel Dratch on raising 17-month-old Eli in NYC: "Does anyone else out there sleep next to a bucket of poop? Just wondering. #Isharemyroomwithababy #nyliving"She later clarified to followers that she didn't literally mean a bucket, but "your standard diaper genie situation."

Any funny celebrity tweets you want to add to the list? Put them in the comments section below. And let us know a couple of your must-follow celebs so that we can make sure we're tracking what they're saying, too.